Cooling, cylinder, jacket and head construction



9 194% 0. PETERSEN COOLING, CYLINDER, JACKET AND HEAD CONSTRUCTION Filed May 8, 1946 Patented Nov. 8, 1949 OFFICE COOLING, CYLINDER, JACKET AND HEAD CONSTRUCTION Ove Petersen, Gentofte, Denmark Application May 8, 1946, Serial N0. 668,226 In Denmark April 19, 1945 Section 1, Public Law 690, August 8, 1946 Patent expires April 19, 1965 2 Claims. (01. 123-473) The present invention relates to an arrangement in piston engines, especially internal combustion engines, of the kind where the cylinders are clamped with a flange between a cylinder cover and a cooling jacket, the abutment surface of which for the flange of the cylinder is mainly situated in continuation of the rectilinear wall of the cooling jacket and preferably is formed by the upper edge of the latter.

In internal combustion engines of this kind there may, when the stay bolts with which the cover is clamped to the stationary engine parts are placed close to the cylinder and the cooling jacket, be attained a considerable reduction of the stresses acting on the cover, especially of the prevailing moments of flexion. The purpose of the invention is to reduce still more the stresses on the cover by making possible a simpler and more rational construction of the latter with larger space for the provision and suitable disposition of cooling space. This is attained by creating the possibility of transferring some of or all of the openings leading to the working space, such as bores for valves, fuel nozzles, and other accessories, from the cover to the cylinder proper. If such passages are placed in the cover they must be cast integral with the latter in the form of transitional bosses or tubes, which gives rise to disadvantageous accumulations of material especially at the surface of the cover facing the working space, through which cover surface large amounts of heat are to be led away.

In accordance with the invention the flange of the cylinder now has such height that its abutment surface on the cooling jacket is situated at such a distance from the end of the cylinder adjacent the cover and so much nearer the stationary engine parts than the surface of the cover facing the working space that openings leading tov the working space, such as bores for valves, fuel nozzles, and other accessories may be placed in the cylinder.

The flange of the cylinder may then in accordance with the invention consist of a cylindrical collar enclosing the outermost end of the cylinder and situated in line with the wall of the cooling jacket, by which construction an unnecessary accumulation of material is avoided.

The invention is illustrated on the drawin 'which schematically shows a section through parts of the cylinder, cooling jacket, and cylinder cover of an internal combustion engine with omission of all the details irrelevant to the invention.

On the drawingl designates part of the stationary framing of the engine, which in the embodiment shown serves as scavenging air box I2. 2 designates a cylinder and 3 a cooling jacket surrounding the latter, which jacket below rests on an abutment surface 4 on the stationary framing l. The cooling jacket is made as a tube with rectilinear walls, and its upper edge I5 forms abutment or seating surface for the suspension flange [5 of the cylinder. At top the cylinder is widened conically, so that its abutment or treading surface 5 for the cylinder cover 6 lies in the continuation of the rectilinear wall of the cooling jacket. The cover is centered in relation to the cylinder with a conical projection 8 which with a slight clearance fits into the conical part of the liner. Cover, cylinder, and cooling jacket are secured together and to the stationary framing by means of stay bolts not shown, which are anchored in the framing and tighten on the top of the cover with nuts.

The flange of the cylinder is made as a high cylindrical collar l6 situated in line with the cooling jacket 3- and the abutment surface l5 between these two parts is so far below the underside of the cover that in the intermediate space there will be room for making transverse bores IT for the accessories.

As will be seen, the cylinder is secured at its upper end, while its lower end is guided, liquidand air-tight, but axially displaceably in the cooling jacket and the upper side of the scavenging air box, so that the scavenging air ports [3 are situated freely within the scavenging air box.

The invention is not limited to the embodiment shown and described. The stay bolts may be mounted in any number desired, preferably four per cylinder. The engine may be any internal combustion engine or other piston engine, such as a steam engine, a pump, or a compressor. The cooling jacket may form a more or less integral part of the stationary framing.

I claim:

1. In a piston engine a cylinder, a cover therefor provided with a marginal treading surface, a cooling jacket surroundin the cylinder provided with a seating surface adjacent the upper end thereof at a considerably lower level than said treading surface, a laterally projecting flange at the upper end of the cylinder and clamped between the treading surface on the cover and the seating surface on the jacket, the lower surface of the cover confining the cylinder working space being situated between the levels of the upper edge of the cooling jacket and said treading surface respectively, and said cylinder flange being REFERENCES CITED provided with apertures for receiving cylinder accessories for positioning directly into the workg fig gf sf are of record m the ing space of the cylinder. p

2. A piston engine as claimed in claim 1 in 5 UNITED STATES PATENTS which the cylinder flange is in the form of a Number Name Date cylindrical collar surrounding the upper end of 1 306 843 wolgamott June 17 1919 the cylinder and lying substantially flush with 1526574 verhey Feb 1925 the rectilinear wall of the cooling jacket. 1599242 g sep't. 1926 10 1,893,192 Barbarou Jan, 3, 1933 (WE PETERSEN 2,170,443 Barbarou Aug. 22, 1939 

